Google has recently began sending out notices of the duplicate place listings conflict via email to those impacted by this issue. The email reads:
We’d like to inform you that Google Places no longer accommodates more than one authorized owner per business location. Your account contains one or more listings that have been identified as duplicates of other listings and as a result, some of the information you provide will not be shown to Google users anymore…
Jade Wang from Google posted a detailed how to fix this issue in the Google Business Help forums where she summed up the issues two-fold:
(1) Your account and another account that you don’t control became verified for the same business using the old Places dashboard.
(2) You may have verified the page multiple times using accounts you control.
Each has their own method of resolving, which Google has either emailed the business owner or you can read them below in more detail.